"We" don't ignore them. Every major government has a body dedicated entirely to automobile safety. In the USA, this is NHSTA - National Highway Safety & Transportation Administration. They maintain an information system of traffic fatality statistics in the USA, called FARS (fatality analysis reporting system). This system is used to determine new safety devices and standards for vehicles and to test their effectiven…
When you believe car centric development is harmful to its core, it's poor consolation that we're spending even more ineffectual resources on top of that to try to curtail the harms.